On Monday, Queen Elizabeth II became the first monarch to celebrate a sapphire jubilee, after 65 years on the throne.

The 90-year-old British monarch is also the U.K.'s longest-reigning royal, BBC notes, and to mark the occasion, the Queen had a portrait done by British photographer David Bailey.

"On 6 February 1952, King George VI sadly died following a prolonged illness. Princess Elizabeth immediately acceded to the throne, becoming Queen Elizabeth II and taking on all of the responsibilities which came with her new title," the Royal Family wrote on their Facebook page.

"In the photograph, The Queen is wearing a suite of sapphire jewellery given to her by King George VI as a wedding gift in 1947."

Members of the Honourable Artillery Company fire a 62 round royal gun salute from the Gun Wharf outside the Tower of London with Tower Bridge seen in the background to mark the anniversary of Queen Elizabeth II's accession to the throne in London on February 6, 2017.

Queen Elizabeth II visits Canterbury Cathedral where she unveiled a statue of herself and one of Prince Philip, Duke of Edinburgh to mark her Diamond Jubilee on March 26, 2015 in Canterbury, England.

"I think I speak for my generation when I say that the example and continuity provided by The Queen is not only very rare among leaders but a great source of pride and reassurance," Prince William, The Duke of Cambridge, said about his grandmother in a statement.

Buckingham Palace also released photos and videos of the Queen over the last few years, marking her 65-year reign.

"The Queen carries out all of her duties against the backdrop of a full personal life which has seen her raise four children and welcome grandchildren, and now great-grandchildren to the Royal Family. The Duke of Edinburgh has been – in her own words – her ‘strength and stay’ during her reign, whilst other members of the Royal Family continue to offer vital support through their work in the UK and overseas."

Now that's badass.

Queen Elizabeth II visits Canterbury Cathedral where she unveiled a statue of herself and one of Prince Philip, Duke of Edinburgh to mark her Diamond Jubilee on March 26, 2015 in Canterbury, England.